package com.example.heatbeat;
import java.net.InetSocketAddress;

import io.netty.bootstrap.Bootstrap;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.DatagramPacket;
import io.netty.channel.socket.nio.NioDatagramChannel;
import io.netty.util.CharsetUtil;
/**
 * @author xingzhiwen
 * @date 2021/11/16
 * @ddescription:
 */
/**
 * 客户端启动类
 *
 * @author Administrator
 *
 */
public class NettyUDPClientTest {

    public void run(int port) throws Exception {
        EventLoopGroup group = new NioEventLoopGroup();
        try {
            Bootstrap b = new Bootstrap();
            b.group(group).channel(NioDatagramChannel.class)
                    .option(ChannelOption.SO_BROADCAST, true)
                    .handler(new NettyUDPClientHandler());
            Channel ch = b.bind(0).sync().channel();
            // 向网段内的所有机器广播UDP消息
            ch.writeAndFlush(new DatagramPacket(Unpooled.copiedBuffer("谚语字典查询？",CharsetUtil.UTF_8),
                    new InetSocketAddress("255.255.255.255", port))).sync();
            if (!ch.closeFuture().await(15000)) {
                System.out.println("查询超时！");
            }
        } finally {
            group.shutdownGracefully();
        }
    }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        int port = 8080;
        try {
            new NettyUDPClientTest().run(port);
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}